There's another community post with 404 debugging tips that might be helpful. Please give these solutions a try and let us know how it goes.

https://community.vercel.com/t/debugging-404-errors/437

A human should be around soon to offer more advice. But you can also get helpful information quickly by asking v0.

I can see that your app were deployed successfully. You can access files here for example: https://craivings.vercel.app/code/data/clean/all_data.json.

You can get started with https://vercel.com/templates/next.js/nextjs-fastapi-starter to understand how frontned and backend Python API code needs to form for Vercel deployment.

Hi Swarnava, does it have to be exactly the same template? The frontend and backend seem to run well locally so I’m a bit confused what went wrong here since it also successfully deployed.

Somewhere yes, for example, your python code always need to be within /api folder, otherwise it won't work